Issue 1, 2025
From the journal:

Chemical Communications

Utilising triplet–triplet annihilation upconversion for overall photocatalytic water splitting†

E. Madbak, ORCID logo a   D. J. Osborn, ORCID logo a   T. Small,a   T. Ishwara, ORCID logo b   T. W. Schmidt, ORCID logo b   K. Domen ORCID logo c  and  G. F. Metha ORCID logo *a  

* Corresponding authors

a Department of Chemistry, University of Adelaide, Adelaide, SA 5005, Australia
E-mail: greg.metha@adelaide.edu.au

b School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia

c Office of University Professors, The University of Tokyo, Japan

Abstract

An organic triplet–triplet annihilation upconversion system consting of Ir(coumarin-6)2(acac) and TIPS-naphthalene is used to drive overall water-splitting using the UV-active photocatalyst Rh/Cr2O3/CoOOH/Al:SrTiO3. Light from 455 and 470 nm LEDs was upconverted to 355–410 nm at 6.1% efficiency. Hydrogen production doubled at 455 nm and tripled at 470 nm, compared to controls.

Graphical abstract: Utilising triplet–triplet annihilation upconversion for overall photocatalytic water splitting

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Article information

DOI
https://doi.org/10.1039/D4CC03961K
Article type
Communication
Submitted
04 Aug 2024
Accepted
25 Nov 2024
First published
03 Dec 2024

Chem. Commun., 2025,61, 157-160

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Utilising triplet–triplet annihilation upconversion for overall photocatalytic water splitting

E. Madbak, D. J. Osborn, T. Small, T. Ishwara, T. W. Schmidt, K. Domen and G. F. Metha, Chem. Commun., 2025, 61, 157 DOI: 10.1039/D4CC03961K

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